Sheet stock punch head housing



Nov- 24. 1953 A. o. MARSH SHEET STOCK PUNCH HEAD HOUSING Filed Aug. 7;1950 MHESH, INVENTOR.

Patented Nov. 24, 1953 UNITED STATE OFFICE SHEET STOCK PUNCH HEADHOUSING Allan 0. Marsh, Los Angeles, Calif.

Application August 7, 1950, Serial No. 178,119

4 Claims. (01. 164-91) my prior'United States Letters Patent 2,587,185,

patented February 26 1952 on an application filed Septemberl'I, 1946.The claims in the aforementioned patent are directed generally to anoperating rod coasting with a punch head. whereas the presentapplication isdirected generally, as indicated in the precedingparagraph, to a punch head housing which houses and mounts essentialelements for performing a punching operation. 7 I

It is therefore an object of the present invention to provide a novelhousing of sheet stock which is adapted to include the necessary components for punching holes in paper.

Another object of the present invention is to provide a housing of thischaracter characterized by its inexpensiveness, simplicity and ease of rmanufacture in accordance with present day mass. production techniques.a

' In general, an object of the present invention is to provide animproved paper punch.

The features of the present invention which are believed to be novel areset forth with particularity in the appended claims. This inventionitself. both as to its organization and manner of operation, togetherwith further objects and advantages thereof, maybe best understood byreference to the following description taken in connection withthe-accompanying drawings in which:

' Figure 1 is a perspective view showing a paper punch embodyingfeatures of the present invention;

Figure2 is a sectional view taken substantially on the line 22 of Figure1; a 1

Figure 3 is a sectional view taken. substantially on the line 3-4 ofFigure 2; and

Figure 4 shows the general iorrrnnot necessarily in proportion, of thestamped sheet stock, in flat form, prior to its being formed as ahousing for the component parts of the individual punches shown in theprevious figures.

The punch consists essentially of a base member ID to which isreleasably fastened, by means of knurled bolts It, in spacedrelationship, a pair of punch heads H, I2 with a longitudinally groovedoperating rod l3 passing through the individual punch heads 2 I, I2,such operating rod 7 having aflixed thereto a manually operable handleI4, operation of which results in rotation of the operating rod l3 andresulting downward movement of the punch die l5, which is operativelyconnected to the rod l3 in the manner shown in Figure 2. f

The present invention concerns itself particularly with the method offormig the die head housing It and resulting structure. Heretofore,

the housing for the die member It consisted of a relatively expensivecasting or forging or other element which required expensive latheoperations in its fabrication. An important feature of the presentinvention is that such housing i8 is formed of prestamped sheet metalstock-.-

The sheet stock is stamped to have the general form shown in Figure 4.Such fiat sheet I9, shown in Figure 4, is centrally apertured at [9A andis bent back upon itself along generally a line represented by thedotted line 26 in the process of forming the tubular end portions 2!, 22(Figure 3). It will be observed that the cylindrical portion or tube 22,in fact, comprises a pair of vertically aligned tubular sections 22A and22B.

The movable punching die 25, having an integrally formed annular flangel5A thereon, is mounted for vertical movement in the tubular portion22A, with the longitudinally extending grooved portion !3A of operatingrod i3 partially embracing a peripheral portion of the flange 15A, asshown in Figure 2.

This operating rod l3 passes through circular spaced bearing aperturedportions NBC in each of the die heads 12. Such die punch i5 is normallybiased upwardly by the coil compression spring 23, having its upper endbearing against the lower flange I5Bon the die punch and its lower endbearing against the spring retaining disk 24,

which is prevented from leaving the lower end of the tubular portion 22Aby deforming the peripheral edges thereof, as for example by crimping,to produce the inwardly extending projecting portions 2213 (Figure 3).The lower die punch 25, in the form of a ring, which cooperates with themovable die punch it, may simply rest on the upper peripheral edge ofthe lower tubular sectionilZB, there being, as shown in Figure 2, anannular flange on the die memher 25 which prevents the die 25 fromfalling into the tubular section 22B, and there also being an innerannular flange portion 25A which cooperates with the inner walls of thelower tubular section 223 to maintain it in centered relationship withrespect to the other die member [5.

It is observed that the base ID, to which the die heads are secured, hasa recessed ledge IDA contiguous with a transversely extending guide [6Bwhich conforms generally with the shape of the lower bulbous portionIEZE of the housing 18.

Such housing is preferably releasably secured for adjustment purposes tothe base It? by means of knurled bolts It but, if desired, may bepermanently afiixed thereto by rivets which pass through the tubularportion 2! and slotted portion of the base l0. Such slotted portionifiC, as shown in Figure 1, extends transversely of the base H1 in adirection extending parallel with the longitudinal axis of the bulbousportion liJB.

A careful inspection of Figures 3 and 4 shows that the housing 58 formedfrom the prestamped flat sheet stock It is formed to provide the tubularportion 2!, the tubular portions 22A, 2213, as well as the circularbearing portion [330 (Figure 2).

The housing I8 thus consists essentially of a double layer ofjuxtapositioned sheet metal 1naterial Welded together, as for example bywelding material 30. Each of such juxtapositioned layers havecooperating reentrant portions which define the pair of cylindricalportions 2 l, 22 having their parallel axes extending generally parallelwith I;

the planes of such sheet layers. Also, each of such layers define thepaper opening 2'1 provided by the apertured portion ISA, such reentrantportion 21 (Figure 2) being contiguous with one edge of thejuxtapositioned layers and extending through the cylindrical portion 22to divide the same into two vertically aligned cylindrical portions 22A,22B. The upper tubular section 22A is intersected by a cylindricalportion lfiq'having its axis extending generally perpendicular to theaxes of the juxtapositioned layers provided by the formed sheet [9.

It is evident, from the teachings incorporated herein, that thejuxtapositioned layers of sheet material shown in Figure 3 may havetheir ends terminating other than as shown in Figure 3, where such ends19E, [F abut on the circumference of the tubular section 2|. It ispreferred that these ends 1923, IEF abut as shown in Figure 3 instead ofon the circumference of the tubular section 22, since the tubularsection 22 should be stronger than the tubular section 2|. As men tionedabove, such tubular section 21 may be clamped either permanently orsemi-permanently to the base iii, and when, as preferred, the knurledbolt is is used, the housing [8 ma be released from the base byloosening the hexagonal nut 33 threaded on the bolt l6.

While the particular embodiments of the present invention have beenshown and described, it will be obvious to those skilled in. the artthat changes and modifications may be made without departing from thisinvention in its broader aspects and, therefore, the aim in the appendedclaims is to cover all such changes and modifications as fall within thetrue spirit and scope of this invention.

I claim:

1. In a punch of the character described, a punch head housingcomprising: a double layer of juxtapositioned sheet stock material, eachlayer having cooperating spaced reentrant portions which define a pairof cylindrical tubular portions having their parallel axes extendinggenerally parallel with the planes of said sheet stock material, each ofsaid layers having an apertured portion contiguous with one edge of saidjuxtapositioned layers and extending through one of said cylindricalportions to divide said one cylindrical portion into two verticallyaligned spaced cylindrical portions, the upper one of said alignedspaced cylindrical portions being intersected by a third cylindricalportion defined between juxtapositioned layers and. having its axisextending generally perpendicular to the axis of said one cylindricalportion, a punch die supported for sliding movement in said upper one ofsaid aligned cylindrical portions, said die having a shoulder thereon,an operating rod with a longitudinally extending grooved portion passingthrough said third cylindrical portion with the grooved portion thereofembracing said shoulder, a spring within said upper cylindrical portionand acting to bias said shoulder up into engagement with said groovedportion of said operating rod, a spring seat against which the lower endof said spring bears, means retaining said spring and spring seat withinsaid cylindrical portion, a second cooperating cylindrical ring-shapeddie disposed within the lower one of said aligned spaced cylindricalportions, and means retaining said second die on said lower cylindricalportion.

2. In a punch of the character described, a punch head housingcomprising: a double layer of juxtapositioned sheet stock material, eachlayer having cooperating spaced reentrant portions which define a pairof cylindrical tubular portions having their parallel axes extendinggenerally parallel with the planes of said sheet stock material, each ofsaid layers having an apertured portion contiguous with one edge of saidjuxtapositioned layers and extending through one of said cylindricalportions to divide said one cylindrical portion into two verticallyaligned spaced cylindrical portions, the upper one of said alignedspaced cylindrical portions being intersected by a third cylindricalportion defined between juxtapositioned layers and having its axisextending generally perpendicular to the ax1s of said one cylindricalportion, a punch die supported for sliding movement in said upper one ofsaid aligned cylindrical portions, said die having a shoulder thereon,an operating rod with a longitudinally extending grooved portion passingthrough said third cylindrical portion with the grooved portion thereofembracing said shoulder, a spring within said upper cylindrical portionand acting to bias said shoulder up into engagement with said groovedportions of said c operating rod, a spring seat against which the lowerend of said spring bears, and the lower edge of said upper cylindricalportion being deformed to retain said spring and said spring seattherein, and a second cooperating ring-shaped die disposed within thelower one of said aligned spaced cylindrical portions, and meansretaining said second die on said lower cylindrical portion.

3. In a punch of the character described, a punch head housingcomprising: a double layer of juxtapositioned sheet stock material, eachlayer having cooperating spaced reentrant portions which define a pairof cylindrical tubular portions having their parallel axes extendinggenerally parallel with the planes of said sheet stock material, each ofsaid layers having an apertured portion contiguous with one edge of saidjuxtapositioned layers and extending through one of said cylindricalportions to divide said one cylindrical portion into two verticallyaligned spaced cylindrical portions, the upper one of said alignedspaced cylindrical portions being intersected by a third cylindricalportion defined between juxtapositioned layers and having its axisextending generally perpendicular to the axis of said one cylindricalportion, a punch die supported for sliding movement in the upper one ofsaid aligned cylindrical portions, said die havinga shoulder thereon,and an operating rod. with a longitudinally extending grooved portionpassing through said third cylindrical portion with the grooved portionthereof embracing said shoulder, a spring within said upper cylindricalportion and acting to bias said shoulder up into engagement with saidgrooved portion of said operating rod, a spring seat against which thelower end of said spring bears, and the lower edge of said uppercylindrical portion being deformed to retain said spring and said springseat therein, and a second cooperating cylindrical ring shaped diedisposed within the lower one of said aligned spaced cylindricalportions, said second die having an annular flange resting on the upperedge of said lower cylindrical portion.

4. In a punch of the character described, a punch head housingcomprising: a double layer of juxtapositioned sheet stock materialformed from a single sheet of material, each layer having cooperatingspaced reentrant portions respectively at the center and at the ends ofsaid sheet of material which define a pair of cylindrical tubularportions having their parallel axes extending generally parallel withthe planes of said sheet stock material, each of said layers having anapertured portion contiguous with one edge of said juxtapositionedlayers and extending through one of said cylindrical portions to dividesaid one cylindrical portion into two vertically aligned spacedcylindrical portions, the other one of said cylindrical portionsincluding the abutting edges of said single sheet of material, the upperone of said aligned spaced cylindrical portions being intersected by athird cylindrical portion defined between juxtapositioned layers andhaving its axis extending generally perpendicular to the axis of saidone cylindrical portion, a punch die supported for sliding movement inthe upper one of said aligned cylindrical portions,

said die having a shoulder thereon, and an oper- References Cited in thefile of this patent UNITED STATES PATENTS Number Name Date 1,060,772Leniham May 6, 1913 1,152,886 Dom Sept. 7, 1915 1,940,883 Rollings Dec.26, 1933 2,102,292 St. Louis et al Dec. 14, 1937 2,335,552 Unger Nov.30, 1943 2,587,185

Marsh Feb. 26, 1952

